It looks like you need to connet the DSLAM directly to the internet.
The customer end is the easy one. The DSL rides the subs phone line to the premise and the sub pays me to rent the line from the RBOC. If your drawing is complete, then I have to install the DSLAM and provide a tie pair to pick up dialtone and send it out to the customer. The RBOC should provide me a path to the ISP. If thats the case then the RBOC will charge me a reasonable fee for that service and I pass it on to my customer. If I have to pay for the line to the ISP, then it doesn't seem to work financially. How many customers are willing to pay $75-$100 a month for a DSL without the ISP charge? Something doesn't compute unless the RBOC's are loosing money at $29 per month.